Michael D Weiser

Learn More
The process of reproductive caste determination in eusocial insect colonies is generally understood to be mediated by environmental, rather than genetic factors. We present data demonstrating unexpected genetic differences between reproductive castes in a variant of the rough harvester ant, Pogonomyrmex rugosus var. fuscatus. Across multiple loci, queens(More)
Although many taxa show a latitudinal gradient in richness, the relationship between latitude and species richness is often asymmetrical between the northern and southern hemispheres. Here we examine the latitudinal pattern of species richness across 1003 local ant assemblages. We find latitudinal asymmetry, with southern hemisphere sites being more diverse(More)
Social insects exhibit remarkable variation in their colony breeding structures, both within and among species. Ecological factors are believed to be important in shaping reproductive traits of social insect colonies, yet there is little information linking specific environmental variables with differences in breeding structure. Subterranean termites(More)
RESEARCH Global diversity in light of climate change: the case of ants Clinton N. Jenkins*, Nathan J. Sanders, Alan N. Andersen, Xavier Arnan, Carsten A. Brühl, Xim Cerda, Aaron M. Ellison, Brian L. Fisher, Matthew C. Fitzpatrick, Nicholas J. Gotelli, Aaron D. Gove, Benoit Guénard, John E. Lattke, Jean-Philippe Lessard, Terrence P. McGlynn, Sean B. Menke,(More)
Nathan G. Swenson*, Brian J. Enquist, Jason Pither, Andrew J. Kerkhoff, Brad Boyle, Michael D. Weiser, James J. Elser, William F. Fagan, Jimena Forero-Montaña, Nikolaos Fyllas, Nathan J. B. Kraft, Jeffrey K. Lake, Angela T. Moles, Sandra Patiño, Oliver L. Phillips, Charles A. Price, Peter B. Reich, Carlos A. Quesada, James C. Stegen, Renato Valencia, Ian J.(More)
M. C. Fitzpatrick (mfitzpatrick@umces.edu), Univ. of Maryland Center for Environmental Science, Appalachian Lab, Frostburg, MD 21532, USA. ! N. J. Sanders, Dept of Ecology and Evolutionary Biology, 569 Dabney Hall, Univ. of Tennessee, Knoxville, TN 37918, USA, and Center for Macroecology, Evolution and Climate, Dept of Biology, Univ. of Copenhagen, DK-2100(More)
There is a long tradition in ecology of evaluating the relative contribution of the regional species pool and local interactions on the structure of local communities. Similarly, a growing number of studies assess the phylogenetic structure of communities, relative to that in the regional species pool, to examine the interplay between broad-scale(More)
Plant diversity, like that of most other taxonomic groups, peaks in the tropics, where climatic conditions are warm and wet, and it declines toward the temperate and polar zones as conditions become colder and drier, with more seasonally variable temperatures. Climate and evolutionary history are often considered competing explanations for the latitudinal(More)